共查询到18条相似文献，搜索用时 203 毫秒
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目的:研究踺子转体180°前手翻接直体前空翻类跳马动作,揭示这类跳马的运动学规律和技术特点.方法:对程菲和洪淑贞完成的"踺子转体180°前手翻接直体前空翻转体180"(简称"R180"),以及程菲完成的"踺子转体180°前手翻接直体前空翻转体540°"("程菲跳")进行三维运动学分析,对三组跳马动作身体重心的水平速度和垂直速度、主要关节的位移、关节角度、身体翻转角速度等运动学参数进行对比分析.结果:三组动作踏板时重心水平速度基本相同,踏板及推手阶段关键位置的关节角度相近,但"程菲跳"推离马重心垂直速度和第二腾空时间明显高于"R180",第二腾空转体角速度略大于"R180"的3倍,而翻腾角速度略小.结论:踺子转体180°前手翻接直体前空翻类跳马动作触马前的技术动作基本相同,难度较高的技术动作需要更高的推离马垂直速度和更快的第二腾空转体角速度. 相似文献
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跳马“踺子转体180°前手翻屈体前空翻”动作上板踏跳技术分析 总被引：3，自引：0，他引：3
采用三维影片解析法,分析了许钢跳马“踺子转体180°前手翻”类动作上极踏跳技术。结果表明：许钢在侧手翻推离地面时已开始了“纵转180°向外转体”,至着板、蹬离时已完成了较大幅度的转体动作;踏跳过程中,水平速度损失少,重心轨迹左右偏离度小。 相似文献
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踺子转体180°前手翻前空翻类动作是跳马项目近几年开发的一类高难度动作,从当前发展情况看,此类动作发展的潜力很大,已经成为新的潮流动作。我国女子优秀跳马运动员程菲能较好完成踺子转体180°前手翻转体180°直体前空翻的高难前沿动作,研究她完成此动作的运动学规律及主要技术特点,旨在为其今后发展此类动作的更高难度提供运动学参数,同时对有条件发展此类动作的运动员也具有理论和实际运用价值。 相似文献
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运用文献资料法、观察法及录像解析法研究了我国世界跳马冠军陆斌完成的男子跳马高难度前沿动作前手翻直体前空翻转体900°的运动学规律,分析了他完成踏跳、推手和第二腾空等几个最关键的技术环节的特点.提出的技术参数可以为我国运动员发展和改进该动作技术提供参考依据. 相似文献
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目的通过7名江苏籍一线体操运动员与陆斌相关数据的对比分析,得出优秀运动员跳马前手翻类动作技术参数,以期为运动训练和技术改进提供参考依据.方法通过ARIEL影片解析系统,解析江苏省体操队2009年3月队内测试和陆斌2007年参加"好运北京"体操国际邀请赛决赛中跳马前手翻直体前空翻转体540°动作技术的速度指标、时间指标、空间指标进行比较分析.结果在踏跳阶段陆斌的垂直速度均大于7名运动员,7名运动员第一腾空时间明显长于陆斌,髋关节、膝关节角度过大,陆斌扶马推马缓冲时间稍短,7名运动员推马时水平速度比陆斌大0.42 m/s,垂直速度却小0.87 m/s,陆斌第2腾空时间为1.10 s,比其他运动员时间长0.11 s,整个转体过程中髋角的变化量7名运动员较大于陆斌.结论运动员需增加助跑速度,以获得较大速度上板;踏板时,减小膝关节角度,提供蹬伸所需条件;缩短第一腾空时间,积极主动撑马,为做较大背弓需保持适宜髋膝角度;推手短促有力,注意延长第2腾空的时间及这阶段身体形态和用力方式的控制. 相似文献
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采用三维高速摄影和影片解析的方法,对我国优秀男子体操运动员黄力平、黄华东等人完成跳马“踺子转体180°前手翻”类动作纵转180°技术时的空间及时空特征等,进行比较分析。结果显示,完成纵转180°技术时,应避免在踏板阶段过早转体;应充分利用手臂的非对称性运动,做到“快转体,早摆腿”;推手阶段要尽可能利用腕、肘、肩的弯屈度,充分推伸、拉展等。 相似文献
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以录像解析数据为依据,对2005年十运会上李小鹏、陆斌跳马前手翻直体前空翻转体900°动作完成情况的主要技术环节,包括上板踏跳、第一腾空、扶马推手、第二腾空等技术进行运动学特征诊析,为进一步改进和提高此技术提供参考依据. 相似文献
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运动生物力学分析、对比分析、文献资料等方法,对我国优秀男子蹦床运动员陆春龙与董栋813〈空中技术进行研究。研究发现813〈,屈体姿势形成是在第一个180°转体后,当翻转360°时身体迅速打开,展体结束时腾空高度接近最高高度,随后翻转和转体同时进行转体的速度比翻转的速度快,第一个180°转体动量距来自双臂急剧摆动产生,后面540°转体动量距来髋关节的屈伸产生。 相似文献
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James H. Mccormick Perla Subbaiah Harvey J. Arnold 《Research quarterly for exercise and sport》2013,84(4):313-322
Abstract This article presents a method to analyze the scoring of judges in springboard diving by identifying some of the components of a dive which are useful in predicting the scores of the judges. A videotape recording of 26 divers doing the front dive half-twist was made at the 1979 men's A.A.U. prequalifying meet, held at Ohio State University. The method of measurement involved the use of clear plastic grids placed over the video monitor. The maximum height of the diver above the board, distance out from the board, size and duration of splash, numerous body angles at various times during the dive, as well as deviation of twist from 180 degrees were measured. A Stepwise Multiple Regression program was used to generate a prediction equation using a subset of these variables which would best predict the total score of the judges for each dive. The equation generated included height, distance, twist, and lower body angle at the point when the diver's head was opposite the board; the equation predicted the scores of the judges with a multiple correlation coefficient R = .80. The particular variables identified would of course be different for other types of dives, and might very well differ for a new set of data for the front dive half twist. However, the method presented provides the diving community with a procedure for identifying some of the components in a particular dive that partially explain what is in the judge's mind. 相似文献
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The purpose of this study was to measure the contributions of the motions of body segments and joints to racquet head speed during the tennis serve. Nine experienced male players were studied using three-dimensional film analysis. Upper arm twist orientations were calculated with two alternative methods using joint centres and skin-attached markers. The results showed that skin-attached markers could not be used to calculate accurate upper arm twist orientations due to skin movement, and that the use of joint centres produced errors of more than 20 degrees in the upper arm twist orientation when the computed elbow flexion/extension angle exceeded 135 degrees in the final 0.03 s before impact. When there were large errors in the upper arm twist orientation, it was impossible to obtain accurate data for shoulder or elbow joint rotations about any axis. Considering only the contributors that could be measured within our standards of acceptable error, the approximate sequential order of main contributors to racquet speed between maximum knee flexion and impact was: shoulder external rotation, wrist extension, twist rotation of the lower trunk, twist rotation of the upper trunk relative to the lower trunk, shoulder abduction, elbow extension, ulnar deviation rotation, a second twist rotation of the upper trunk relative to the lower trunk, and wrist flexion. The elbow extension and wrist flexion contributions were especially large. Forearm pronation made a brief negative contribution. Computed contributions of shoulder internal rotation, elbow extension and forearm pronation within the final 0.03 s before impact were questionable due to the large degree of elbow extension. Near impact, the combined contribution of shoulder flexion/extension and abduction/adduction rotations to racquet speed was negligible. 相似文献
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《European Journal of Sport Science》2013,13(6):563-568
AbstractRecent literature has related differences in pelvis–trunk coordination to low back pain (LBP) status. In addition, repetitive motions involving bending and twisting have been linked to high incidence of LBP. The purpose of this study was to examine trunk sagittal motion – axial rotation (‘bend and twist’) coordination during locomotion in three groups of runners classified by LBP status (LBP: current low back pain; RES: resolved low back pain and CTR: control group with no history of LBP). Trunk kinematic data were collected as running speed was systematically increased on a treadmill. Within-segment coordination between trunk sagittal and transverse planes of motion (trunk lean and axial rotation, respectively) was calculated using continuous relative phase (CRP), and coordination variability was defined as the between stride cycle standard deviation of CRP (CRPvar). Bend–twist coordination was more in-phase for the LBP group than CTR (p = 0.010) regardless of running speed. No differences in CRPvar were found between the groups. The results from our coordination (CRP) analysis were sensitive to LBP status and suggest that multi-plane interactions of the trunk should be considered in the assessment of LBP. This analysis also has potential for athletically oriented tasks that involve multi-plane interactions of the trunk, particularly ones that contain asymmetric action, such as sweep rowing or a shot on goal in field hockey or ice hockey. 相似文献
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M.R. Yeadon 《Journal of sports sciences》2013,31(3):199-208
A simulation model and a rigid body model are used to investigate twisting initiated during the take‐off or contact phase. It is shown that it is possible to produce a full twist solely by building up angular momentum in the arms during the contact phase. This method is only half as effective as building up momentum in the whole body during contact. The introduction of twist into a somersault changes the somersault rate by less than 1%. By timing arm adduction appropriately, it is possible to take advantage of nutation and boost the initial value of the tilt angle and so obtain a greater twist rate. Twist may be stopped by the action of piking, since the motion changes from the twisting mode to the wobbling mode of rigid body motion. Transition to and from these two modes can be used to increase or decrease the tilt angle and twist rate. 相似文献
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郭奕海 《山东体育学院学报》2006,22(2):96-98
采取文献资料法、实地观察法、录像观察法、统计法对中外优秀女子蹦床运动员的动作进行分析,得出结论：我国优秀女子运动员和世界优秀女子运动员之间的动作难度差距在于动作的转体和动作姿势上,我国优秀女子运动员的动作转体度数小,以直体、屈体姿势完成的动作少;在动作的翻转上,中外优秀女子运动员之间不存在明显差距. 相似文献
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M.R. Yeadon 《Journal of sports sciences》2013,31(3):209-218
A simulation model and a rigid body model are used to evaluate aerial twisting techniques. It is found that when somersault is not present, a number of cycles of segment counter‐rotation are required to produce one twist. When somersault is present, twist may be introduced by producing tilt using asymmetrical movements of the arms, chest or hips about the sagittal plane. The same asymmetrical movements may be used to remove tilt, although the effectiveness of these techniques is dependent upon body configuration and the direction of somersault. 相似文献